His total earnings would be the sum of the basic salary and the commissions he gets from the sales. For a sale amounting to $9650, $3,000 of it would have 1% commission and $6650 would have 2%. Calculating,
total earning = $120 + 0.01 x $3000 + 0.02 x $6650 = $283
Thus, Jim Tree will have a pay of $283.